#include <btl/Maths/OnlineStatistics.hpp>
#include <iostream>

namespace btl
{
namespace maths
{

std::ostream& operator<<(std::ostream& ss, const OnlineStatistics& stats)
{
   return (ss
           << "n = " << stats.count()
           << "; mu = " << stats.mean()
           << "; sigma = " << stats.populationStdDev());
}

} // namespace maths
} // namespace btl
